apply changes from reviews

Author: jessica-mitchell

doc/htmldoc/nest_behavior/built-in_timers.rst

@@ -76,12 +76,12 @@ Therefore, detailed timers are by default inactive.
 
      .. graphviz:: /simulation_run.dot
         :name: Simulation run (State propagation)
-        :caption: Simplified sequence of operations in the simulation run, organized in a top-down manner.
+        :caption: Simplified sequence of operations in the simulation run, organized in a top-down manner with a focus on timers.
 
      Within the `simulate timer` section, parallel processes
      (`OMP Parallel`) manage time-driven loops, handling tasks such as delivering spike data, and updating timers.
      The `OMP Master` section is responsible for gathering and communicating
-     spike data, involving steps like collocating data, managing MPI buffers, and advancing the simulation time. `OMP
+     spike data, involving steps like collocating data and advancing the simulation time. `OMP
      barriers` are used to ensure thread synchronization at key points (for more details please see `Jordan et al. 2018
      <https://doi.org/10.3389/fninf.2018.00002>`_).
      The timers are indicated in white or light grey.

doc/htmldoc/simulation_run.dot

@@ -43,7 +43,7 @@
             "OMP barrier"
             }
           subgraph cluster_omp_master {
-              label="OMP master"
+              label="OMP Master"
             style=filled fontcolor="white"
             fillcolor="#0E6A93"
             "advance time"
@@ -57,16 +57,9 @@
                          style=filled fontcolor="white" fontname="Helvetica, Arial, sans-serif"
                          fillcolor="#072f42"
                          subgraph cluster_repeat_once {
-                             label="Repeat once if buffer too small"
-                             style=filled#4b210c
+                             label="Repeat once if not all spikes transmitted"
+                             style=filled fontcolor="white"
                              fillcolor="#0E6A93"
-                             subgraph cluster_if_buffers_can_shrink {
-                               label="If buffers can shrink"
-                               style=filled
-                               fillcolor="#072f42"
-                               "shrink MPI buffer size"
-
-                             }
 
 
             subgraph cluster_collocate_spike_data_timer {